Subject:
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Re: robot project
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 25 Nov 1999 14:22:27 GMT
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Original-From:
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fthompson9@aolSAYNOTOSPAM.com
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Viewed:
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1108 times
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In a message dated 11/25/1999 3:52:34 AM Central Standard Time,
mikmiranda@yahoo.com writes:
> Then
> whichever receiver gets the signal first, that’s where
> the owner is and where we want to turn to.
Michael:
You will not get your program to outrun light. The rf signal is moving
at 300,000,000 m/s. If you divide the space between your antennas by
300,000,000 you will get the time difference for the rf arrival time. I
believe you will find that time to be much smaller than a single machine
cycle. You might be able to use this trick with a sound wave and assembler
programming, but not rf.
If you want to find a radio source, I recommend "Transmitter Hunting"
published by the ARRL. They might have it in your local library; they are
most likely to have The ARRL Handbook which will have a section on
directional antennas. You could probably build a "Loop with sense" type
antenna that you would mount on a turning servo. You sample the signal
strength at different directions and pick the strongest (weakest depending on
the antenna). Finding the "Null" direction usually gives a sharper position
than finding the "Peak."
Good Luck,
Pherd
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